[Vanilla Fix] Fix BalloonHover incorrectly considering ground factors when pathfinding

[TaranDahl]

Fixed the bug where technos with BalloonHover=yes incorrectly considered ground factors when setting the destination and distributing moving commands. Use [General]->BalloonHoverPathingFix=true to enable this fix.

[github-actions]

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[Metadorius]

What does this impact? Maybe the fix could be on by default?

[NetsuNegi]

What did this fix

[TaranDahl]

In vanilla, this is not allowed.

In vanilla, these commands will be distributed only on the bridge, because the clicked cell is on the bridge. This makes sense on the ground technos, but not for BalloonHovers. Also happens on cliff.

[TaranDahl]

New commit:

Vanilla behavior👆

New behavior👆
Pay attention to how BalloonHovers selects the destination when attacking the target.

[Metadorius]

Looks to me like the fix could be on by default, and would just have to add migration notice to disable it if undesired.

[Coronia]

These hooks didn't perform very well during performance test with profiler. But I guess there's no much options to optimize the code logic since it still needs to go through the hooks and check no matter if BalloonHoverPathingFix is enabled or not

Is it possible to move the hooks to another places that BalloonHover has already been checked?

[TaranDahl]

These hooks didn't perform very well during performance test with profiler. But I guess there's no much options to optimize the code logic since it still needs to go through the hooks and check no matter if BalloonHoverPathingFix is enabled or not
Is it possible to move the hooks to another places that BalloonHover has already been checked?-----------谷歌翻译-----------是否可以将钩子移至已经检查过BalloonHover的另一个地方？

It seems unlikely because vanilla doesn't check for BalloonHover in these functions.

[TaranDahl]

I placed the IsInAir check at the end, which may slightly improve performance.

[Metadorius]

using a naked hook may improve the situation

[TaranDahl]

using a naked hook may improve the situation-----------谷歌翻译-----------使用裸钩可能会改善情况

Dunno how to do it. Any example?

[Metadorius]

Dunno how to do it. Any example?

Search for DEFINE_NAKED_HOOK in code.

[TaranDahl]

Dunno how to do it. Any example?

Search for DEFINE_NAKED_HOOK in code.-----------谷歌翻译-----------在代码中搜索Define_naked_hook。

Only one use case:

DEFINE_NAKED_HOOK(0x7CD8EA, _ExeTerminate)
{
// Call WinMain
SET_REG32(EAX, 0x6BB9A0);
CALL(EAX);
PUSH_REG(EAX);

__asm {call Phobos::ExeTerminate};

// Jump back
POP_REG(EAX);
SET_REG32(EBX, 0x7CD8EF);
__asm {jmp ebx};

}

Should I write asm like that?

[Metadorius]

Should I write asm like that?

You're not really limited to assembly. You should just keep in mind that a naked hook is simply a jump to the code you write, no prolog, epilog or anything like that, so you should care to not mess up the stack, registers etc.

[ZivDero]

If you want to look at naked hooks, you could look at Vinifera. It's all naked hooks there :P

[TaranDahl]

Too stupid to write asm. Can't finish it myself.
Everything I can do is in the commit that was reverted and just submitted.
Let it be. If it doesn't meet the requirements, I'll close this PR.

[Coronia]

there's another way if the calculation can't be optimized: instead of checking the toggle inside the hooks, we can make it patch down these hooks directly if disabled. See 2ff45a0 for reference

[TaranDahl]

Kerb said this option should be enabled by default🤔

[Coronia]

now that this is proven to have impact on performance, it's not really good to enable it by default. Also this fix will change the behavior of aircrafts which might affect players who's getting used to current behavior

[Metadorius]

@ZivDero maybe you could assist with a naked hook?